I'm getting a lot of these lately. Refreshing the page once or several times fixes the problem, but I'm wondering if anyone else is seeing it.

Mind you this is related to "forums.steampowered.com", not "steamcommunity.com".

You forgot to check mark as question....but yeah I see that and other errors from time to time.

It's not an issue that needs an immediate answer, or a problem that a solution can be provided for. Only the webmasters in charge can fix the issue.